Lanbench Jun 2026
In the age of gigabit internet, high-speed NAS devices, and lightning-fast local networks, understanding your network's true performance is crucial. While many tools exist, stands out as a simple, powerful, and free benchmarking tool designed specifically for Windows TCP network throughput.
Optimized specifically to test TCP network performance.
is a lightweight, portable network benchmarking utility designed to test the performance of a local area network (LAN) by measuring TCP throughput between two computers. It is particularly favored by network administrators and hardware reviewers for its simplicity and low CPU overhead, which ensures that benchmark results reflect network performance rather than system bottlenecks. Key Features & Capabilities Minimalist Design
: Options to test "Send Only," "Receive Only," or bidirectional "Send and Receive" performance. Usability and Portability
Offers versatile testing profiles including Send Only, Receive Only, and simultaneous Send and Receive. Technical Specifications & Architecture LANBench
Unlike iPerf which requires command-line knowledge, LANBench offers a clean, straightforward Windows GUI.
If you’re referring to a — for example, a custom network benchmarking tool you’re developing or one you saw on GitHub — please share:
Verify your switches are not limiting throughput to 100 Mbps (Fast Ethernet).
. Developed by Zach Saw, this freeware tool provides a straightforward, no-nonsense approach to diagnosing network bottlenecks, validating hardware throughput, and testing local network configurations without the overhead of heavy software suites. Built entirely on the Winsock 2.2 API , it utilizes a multithreaded architecture backed by Windows I/O completion ports (IOCP) to maximize throughput while minimizing CPU usage. Key Features of LANBench In the age of gigabit internet, high-speed NAS
Once the test concludes, LANBench displays the average transfer rate, typically measured in Megabits per second (Mbps) or Megabytes per second (MB/s). Interpreting Your LANBench Results
| Tool | Protocol Support | Platform | Key Strength | Key Weakness | |---|---|---|---|---| | | TCP only | Windows | Simple, lightweight, free, portable | Limited to TCP, dated UI | | iPerf3 | TCP & UDP | Cross-platform | Industry standard, highly configurable | No native GUI, steeper learning curve | | LAN Speed Test | File-based | Cross-platform | Works with only one computer (needs shared folder) | Results influenced by disk I/O | | TamoSoft Throughput Test | TCP & UDP | Windows | Supports both TCP and UDP, GUI-based | Less customizable than iPerf | | NetIO-GUI | TCP & UDP | Windows | Tests range of packet sizes automatically | Less intuitive interface |
Should yield real-world speeds around 900–940 Mbps (~110–115 MB/s).
What do the numbers mean? Use this quick benchmark reference for standard wired networks: Network Type Expected Theoretical Speed Healthy LANBench Result 90 – 95 Mbps Gigabit Ethernet (1G) 1000 Mbps (1 Gbps) 900 – 940 Mbps Multi-Gigabit (2.5G) 2500 Mbps (2.5 Gbps) 2.2 – 2.3 Gbps LANBench displays the average transfer rate
If you hang out on Reddit's networking forums , you'll notice many pros prefer . While iPerf is more powerful and works across Linux and Windows, it’s a command-line tool that can be intimidating for beginners.
Download LANBench on both computers and ensure they are connected to the same network. 2. Set Up the Server (Receiver) Open LANBench on the first computer. Select the option (acting as the receiver). Note the IP address of this computer. 3. Set Up the Client (Sender) Open LANBench on the second computer.
LANBench is optimized to ensure that the bottleneck is the network, not the processing power of the computer running the test.
